Index: /trunk/src/VBox/Main/idl/VirtualBox.xidl
===================================================================
--- /trunk/src/VBox/Main/idl/VirtualBox.xidl	(revision 55632)
+++ /trunk/src/VBox/Main/idl/VirtualBox.xidl	(revision 55633)
@@ -10517,5 +10517,5 @@
       <desc>Opens an existing file and places the file pointer at the end of
         the file, creates the file if it does not exist.  This action implies
-        write access. (Was "ca".)
+        write access. (Was "oa".)
         <note>
           <!-- @todo r=bird: See iprt/file.h, RTFILE_O_APPEND - not an action/disposition!
Index: /trunk/src/VBox/Main/src-client/GuestSessionImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-client/GuestSessionImpl.cpp	(revision 55632)
+++ /trunk/src/VBox/Main/src-client/GuestSessionImpl.cpp	(revision 55633)
@@ -3163,5 +3163,5 @@
         case (FileOpenAction_T)FileOpenAction_OpenExistingTruncated: openInfo.mpszOpenAction = "ot"; break;
         case (FileOpenAction_T)FileOpenAction_AppendOrCreate:
-            openInfo.mpszOpenAction = "ca"; /** @todo get rid of this one and implement AppendOnly/AppendRead. */
+            openInfo.mpszOpenAction = "oa"; /** @todo get rid of this one and implement AppendOnly/AppendRead. */
             break;
         default: